I had to change your question to be Little Cup, otherwise I would have to hide it.

Eevee (F) @ Choice Scarf

Trait: Adaptability

EVs: 76 HP / 240 SAtk / 160 Spd

Modest Nature (+SAtk, -Atk)

Echoed Voice

Shadow Ball

Hidden Power [Fighting]

Quick Attack

The power of Echoed Voice increases each turn it is used (by 40), reaching a max of 200. And since you'll be Scarfed... Well, obviously I mean by that that you'll have to be using Echoed Voice consecutively. Works great with Adaptability boost. Shadow Ball and HP Fighting provide type coverage, while Quick Attack provides priority. Really, Quick Attack is only there due to a lack of anything else. While your Attack might not be great, Adaptability kind of makes up for that, although it should still only be used for revenge-killing. Max Sp Attack and Speed EVs (with HP Fighting that is) plus a tiny bit of bulk added. Remember, Little Cup EVs work differently.

What? No. Not at all. The max amount differs from Pokemon to Pokemon. Take Gligar for example. If you wanted to max out Attack and Speed, it would have 236 Attack EVs and 236 Speed EVs (yes, I memorized the EVs needed to max out Gligar's best stats), and no EVs elsewhere.

This sever set is kinda a FEAR set but only which comes out of the unexcpected. Work up is just to raise attack and sp. Attack which is not needed. Endure is when eevee is on low health then flail can put a ton of damage because of STAB.

Iron tail rids those hard-to-KO rock types. Also rids Ice Types. Retaliate does some good damage, but I recommend that you use that when your Pokemon faints and you switch into Eevee. Shadow ball to hit ghost types. Natural Gift for certain types.

The lovely killer. This guy brings me lots of sweeps, or Baton Passes and lets another Pokemon sweep. Work Up boosts both special attack and attack so Stored Power gains 40 power each time. It also hurts Fighting types. Return with Adaptibilaty is a super powerful and then I Baton Pass and then I sweep with another Pokemon.